Results 131 to 140 of about 9,731 (171)
Some of the next articles are maybe not open access.
On the Schumann resonances on Mars
Planetary and Space Science, 1991Abstract A conductive ionosphere and a totally non-conductive layer of the atmosphere close to the surface of the planet form a quasispherical concentric resonator. This provides in principle for the possibility of the existence of global resonances of an electromagnetic field generated by thunderstorm activity or by hydromagnetic waves excited in an
openaire +1 more source
Design of Schumann resonance generator and detector
2017 IEEE 5th International Symposium on Electromagnetic Compatibility (EMC-Beijing), 2017Schumann resonance is generated by lightning with a wavelength equal to the circumference of the earth. There is a practical need for Schumann resonance generator and the corresponding detector to fulfil relevant researches. In this article, we put forward a design of a flexible, reliable generator based on micro control unit and a high-precision ...
Xuan Wang +4 more
openaire +1 more source
Investigation of Schumann resonance polarization parameters
Journal of Atmospheric and Solar-Terrestrial Physics, 1998Abstract The Earth–ionosphere cavity is characterized by a number of disturbances which cause departures from the behaviour expected for the spherical symmetric case usually applied in model calculations. The main effects are the inhomogeneity of the upper atmosphere which is characterised by different conductivity profiles during day and night, and ...
openaire +1 more source
Modern aspects of Schumann resonance studies
Journal of Atmospheric and Solar-Terrestrial Physics, 1997Abstract Schumann resonance (SR) is an electromagnetic extremely low frequency (ELF) phenomenon that occurs in the natural cavity formed by the Earth's surface and the lower ionosphere. Electromagnetic radiation of global thunderstorms is the source of ELF oscillations.
openaire +1 more source
Schumann Resonance Measurement Based on Nonlinear Interaction
Key Engineering Materials, 2010Schumann Resonance relates with global temperature variations, new geophysics phenomena in the low ionosphere and short-term earthquake prediction etc. In this paper based on the nonlinear modulation model of high frequency and extreme-low frequency electromagnetic waves in low ionosphere, the Schumann Resonance observing is researched. Taking the fair
Bing Xia Cao, Xiao Lin Qiao
openaire +1 more source
Schumann resonances in magnetic field components
Journal of Atmospheric and Terrestrial Physics, 1995Abstract The Institut fur Geophysik Gottingen has facilities to record the time varying magnetic components H and D at extremely low frequencies (ELF) (0.1–20 Hz) continuously over several days, with a sampling rate of 100 Hz. The lower ELF-range is characterized by anthropogenic noise and the first two Schumann resonance modes of the Earth ...
openaire +1 more source
Line splitting in the Schumann resonance oscillations
Radio Science, 2007We discuss detection of line splitting in the global electromagnetic (Schumann) resonances. The lifting of resonance degeneracy is usually not visible in the ordinary power spectrum of either the electric or magnetic field components since splitting is small in comparison with the natural width of the resonance lines.
A. P. Nickolaenko, Davis D. Sentman
openaire +1 more source
Schumann resonance amplitude during the Forbush effect
Geomagnetism and Aeronomy, 2008The time variations in the galactic cosmic ray (GCR) intensity at Apatity stations have been compared to the amplitude of the first Schumann resonance (as an indicator of the global thunderstorm activity power) for 12 cases of Forbush decreases in GCRs.
V. K. Roldugin, M. I. Beloglazov
openaire +1 more source
Eigenmode Prediction of the Schumann Resonances
IEEE Antennas and Wireless Propagation Letters, 2018The electromagnetic simulation of the Earth eigenfrequencies is covered, the so-called Schumann resonances. Comparisons to analytical and also measured results are presented, validating the approach. Similar numerical evaluations performed in time domain (finite-difference time-domain) and frequency domain (finite-element method) are also used for ...
openaire +1 more source
Schumann Resonance Signatures of Global Lightning Activity
2008This chapter is concerned with the Earth’s Schumann resonances (SR) and their application to understanding global lightning. The natural electromagnetic waves in the SR frequency range (5 Hz to approx. 60 Hz) radiated by lightning discharges are contained by the Earth-ionosphere cavity.
Gabriella Sátori +2 more
openaire +1 more source